Commentaries:
These verses give us a small window into the Millennium, showing that God will then be involved in actively blessing or cursing all nations, not just Israel. The Bible clearly shows that God is now exercising His sovereignty over His creation and will continue to do so beyond the return of Jesus Christ, even in the area of inanimate things like the weather and ground. Blessing or cursing is an act of His sovereignty conditioned to our response to Him. He is not merely passively paying attention and responding as He sees fit, but even more so initiating actions to bring His people to His desired end.
John W. Ritenbaugh
The Sovereignty of God: Part Four